align_make_input.sh lib_diff is Initialised Empty and Never Set Otherwise

[DarioS]

On line 51, lib_diff='' is declared, it is never set to anything else and is checked on line 64 if [ "$lib_diff" ].

[calizilla]

Thanks Dario. This was a relic from OSCC cohort which had 2 libraries per sample, the script and config was customised to address this. The $lib_diff variable has now been removed.